Packing



(No Model.)

R. J. MCILHENNY.

PAGKING.

N0. 516,547. Patented Mar. 13, 1894.

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NITED STATES PATENT OFFICE.

RICHARD J. MCILHENNY, OF WILMINGTON, NORTH CAROLINA.

PACKING.

SPECIFICATION forming part of Iletters Patent No. 516,547, dated March 13, 1894.

Application filed June 6, 1893. Serial No. 476,788. (No model.)

To all whom it may concern: a

Beit known that I, RICHARD J. MCILHENNY, of Wilmington, in the county of New Hanover and State of North Carolina, have invented a new and Improved Cup-Packing, of which the following is a full', clear, and exact description.

The object of the invention is to provide a new and improved cup packing, which is simple and durable in construction, perfectly steam-air and water tight, arranged to reduce the friction to a minimum and adapted for use on pistons, stnfiing boxes, and other joints admitting of movement.

The invention consists of certain parts and details, and combinations of the same, as will be hereinafter described and then pointed out 'in the claims.

Reference is tobe had to the accompanying drawings, forming a part of this specification,

s in which similar letters of reference indicate views of the blanks for forming two of the` sections. 4

The improved cup packing is applied to a piston which is provided with the usual pistonrod A, formed with a hub B, carrying the circular heads C and D, between which is arranged a partition disk E, located a suitable distance apart from the heads D and C. In the spaces thus formed between the heads C and D and the middle disk E are placed sectional disks F, each formed with an annular flange abutting against the inner surface of the cylinder and corresponding in diameter to the diameter of the heads C, D and disk- E. Each sectional disk F is made of the sections F', F2, F3 and F4, lling the space between the heads and middle disk, the opposite sections F and F2 being fitted on the hub B with side openings.

The rim or flange F5, of the sectional disk wardly in frictional contact with the inner surface of the cylinder in which the piston operates.

-It will be seen that the sides of the sections F and F2 are beveled, so that when an outward movement of the severalsections takes place no gap Whatever is formed between the sections, as the bevel compensates for the in crease of the diameter of the sectional disk v F. In the annular rim of each disk F and near the top of the same, are formed apertures F6, so that Water Iilling into the disk will iioat oil on its surface and through the said openings to the peripheral surface of the cylinder in which the piston works.

It will be seen that .by the wedge-shaped sections F and F2 closing the spaces between the sections at the annular iiange of the respective disk, alll wear is taken up and leak- Y age is prevented from one end of the cylinder to the other through the piston, as the motiveagent holds the individual sections in close frictional contact with the interior sur face of the cylinder to prevent such leakage. New, it will further lbe seen that according to the increase of pressure of the motive agent in the cylinder, an increase of pressure on thel individual sections of the disks takes place, so that the frictional contact of the piston with the cylinder corresponds to the pressure of the motive agent. By this arrangement a self-adjusting metallic cup packing is provided, Which can be used on any kind ofdevice, and is effective when acted upon by any pressure from the smallest amount of force just equal to that required to overcome the inertia of piston and rod alone, to as great a force as can be confined in any cylinder. When force or pressure is lessened in the cylinder the friction is also reduced in pro- IOO 5 I claim as new and desire to secure'by Letters Patent- 1. A cup packing, comprising a hub provided with disks having openings therein, and a packing arranged between the disks 1o and formed of anged sections having beveled adjacent edges, aud provided with apertures in said flanges, substantially as described.

2. A cup packing, comprising a hub, aper- 15 tured heads on the hub, a disk between the heads, and a packing between the heads and disk, said packing consisting of sectional disks, the sections having beveled adjacent edges and provided with annular apertured flanges, substantially as described.

3. The herein described cup packing, consisting of the hub B, the heads C D, provided with apertures C' D', the disk E between the heads, and the disks F between the heads and the disk E, the disks F each being formed s of the sections F F2, F3 and F4 having beveled edges and provided with the annular anges F5 having apertures F6, as specied.

RICHARD J. MCILHENNY. Witnesses:

E. S. TENNENT, C. W. WORTH. 

